The director confirmed the news to TopGear.com saying;
“This film [Fury Road] was green lit three times and fell over three times over a decade. We went to shoot with Mel Gibson back in 2001, but then 9/11 happened, and the American dollar collapsed against the Australian dollar close to 30 per cent, so we lost that amount of budget overnight….
We were then rained out of Australia. The desert rained for the first time in 15 years, and we ended up in South West Africa, Namibia. But in this process, we had dug down deep into the backstory, not only of the characters, but of every vehicle. How the steering wheels became religious artifacts and things like that.
So we ended up with two scripts, without really trying. We’re talking to the studio [Warner Bros] about it as we speak, but which one of the two stories will happen next, I’m not so sure.”
Following the success of the 2014 ‘Mad Max : Road Fury,’ the title for the next sequel was revealed as ‘Mad Max: The Wasteland.’
The 2014 sequel brought in over $370 million worldwide.